Lock



Nm; zo, 1923.

1,475,o82 J. s. PIGA LOCK Filed July- 20. 1922 Patented Nov. 20, 1923.

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Application filed July 20 To all witam tmay camera:

Be it known thatfl, .JosErH S. PIGA, a citizen of the United States,residin at Owendale, in the county of Huron and tate of Michigan, haveinvented certain new and useful Improvements in Locks; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

The invention provides a lock of the type embodying a bow or shackle andwhich is adapted to be opened without requiring the use of a key, thelock bolt releasing means being in the nature of a push button.

Other objects and advantages will be apparent and suggest themselves asthe nature of the invention is understood.

While the drawings illustrate an embodiment of the invention it is to beunderstood that in adapting the same to meet different conditions andrequirements, various changes in the form, proportion and minor detailsof construction may be resorted to without departin from the nature ofthe invention.

Referrlng to the accompanying drawings forming apart of the application,

Figure 1 is a sectional view of parts of a door and door jamb,illustrative of the invention, the lock casing and bow being in section,

Figure 2 is an elevation of a lock embodying the invention,

Figure 3 is a sectional detail on the line 3-3 of Figurel, and

Figure 4 is a detail view of the lock bolt.

Corresponding and like parts are referred to in the followingdescription and designated in the several views of the drawings by likereference characters.

The numeral 1 designates a door jamb and 2 a door in cooperativerelation therewith. A keeper preferably in the form of a large headedscrew or stud 3 is applied to the jamb 1 and receives the bow or shackle4 of the lock when the door 2 is closed and locked. The head of thescrew or stud 3 is of such size as to cover and conceal the bow orshackle 4.

The lock comprises a suitable casing 5 having a removable cover plate.The bow or shackle 4 is pivoted to the casing in any preferred way asindicated at 6 and has a projecting arm 7 and lateral extension 8 at theinner end of the arm.` A spring 9 1922. seriai No. 578,820.

normally tends to hold the bow or shackle L1 in' open position. 'Asshowmthe spring 9 is of the co'ntractile helical type and is connected at oneend to the arm 7 and at its opposite end to the casing 5.

A lock bolt 10 is pivoted at 11 to the front and rear walls of thecasing 5 and is provided at one end with a catch 12 to engage thelateral extension 8 and hold the bow or shackle 4- in closed or lockedposition. The opposite end of the lock bolt 10 is pro'- vicled with alateral extension 13 which is adapted to project through an opening inthe outer or front wall of the casing 5. spring 14 normally holds thepart 13' projected and the catch 12 in engagement with the lateralextension 8. The outer end of the projection 13 is finished to representthe head of a screw and corresponds to the heads of the screws 15 whichsecure the lock to the door 2. The catch 12 is bevelcd to ride upon thelateral extension 8 when closing the bow or shackle 41 about the shankof the fastening element 3. VVhen the lock is in position, theprojecting end of the part 13 is not discernible from the heads of 'thescrews 15, hence to the uninitiated the lock cannot be opened, but toone familiar with the lock the same maybe. readily opened by applyingpressure to the projecting end of the part 13. The lock bolt 10 isformed with trunnions 16 which have ample play in Vbearings of the lockcasing to admit of free pivotal movement of the lock bolt to engage orrelease the lateral extension 8 of the bow or shackle as required.

VVhat is claimed is:

1. A lock of the Character specified com- Vprising a keeper, a casing, amember pivoted within the. casing and having an end portion projectingbeyond the casing and constituting a bow and having the other endportion extended within the casing to form an arm and a lateralextension, a spring normally holding the bow in open position, and alock bolt pivoted within the casing and having a latch at one end toengage the lateral extension of the pivoted member and hold the bow inlocked engagement with the keeper, and having the other end appearingopposite an opening in the casing to be pressed upon to release the saidpivoted member.

2. A lock of the Character specified comprising a keeper, a casinghaving openings to receive headed fastenings, whereby to gage saidlateral extension of the how,

and having a lateral projection extending through an opening of thecasing and having the projecting part finished to represent the heads ofthe fastenngs.

Intestimony whereof I affix my signatul' in pi'esenc'e of two Witnesses.

p JOSEPH S. PIGA. W itnesses: I S. D. MOGREGOR FREDA MUENTENER.

